What is the reason for the hot sale of "Internet celebrity balloons" on the street?

A few days ago, the "Internet celebrity balloon" wounding incident spread rapidly on the Internet. Four young people in Nanjing bought six balloons of internet celebrities and took a taxi to leave. When they smoked, they splashed sparks on balloons, which caused six balloons to explode one after another and burned four young people. The two men were seriously injured, their faces were blackened, many blisters were burned on their hands, and their faces reached second-degree burns. Then came the news that the "network celebrity balloon" exploded in An Wei, Guangdong, Henan and other places.

It is understood that this glowing and flying "Internet celebrity balloon" was named after it first caught fire on the Internet. It consists of transparent balloons, colored LED light bars and batteries. There are two forms: one is plastic pipe connected with colored LED strips; The other one has no plastic pipe, but it can float. Colorful light bands float with balloons, which is very beautiful in the night sky.

The main reason for the explosion of "Internet celebrity balloon" is that vendors filled the balloon with hydrogen. "Hydrogen is a flammable and explosive gas. When the hydrogen content in a closed space such as a balloon is 4%~76%, it will react once it encounters a fire and generate heat. When the heat cannot be discharged, the pressure will expand rapidly, exceeding the surface load of the balloon. There will be an explosion. " Expert introduction.

In addition, the "network celebrity balloons" sold on the street are basically assembled by vendors and belong to "three noes" products. The required lamps, balloons and gas are all purchased from the wholesale market and assembled at home. Because helium is more expensive, it costs 5 yuan to fill a balloon and only 2 yuan for hydrogen, so most retailers will fill balloons with hydrogen.

Experts remind people to buy this kind of celebrity balloon carefully, because the balloon filled with hydrogen is more powerful when heated and burst, which will instantly cause burns and scalds. Moreover, people can't react at the moment of bursting, which may damage the conjunctiva of the eyeball. The charged network celebrity balloon itself has batteries and thermal components, so it is very dangerous to encounter heat sources. If there are feathers, balls and other fillers in the balloon, it will also cause secondary injuries.